This high quality deep impact socket set is built from rugged chromium molybdenum to withstand high force. Ideal for reaching nuts on long studs. Features include high visibility, laser-etched markings to make size selection easy and quick. The impact socket set contains the most popular sizes for most automobile engines and transmissions. Deep well design Black phosphate finish resists corrosion Rugged Chrome molybdenum construction High visibility socket markings for easier socket selection 6 point